//演示一个接受两个参数的函数,它还表明,在函数中修改形参的值不会有限调用程序中的数据
#include<iostream>
using namespace std;
void n_chars(char,int);
int main()
{
    int times;
    char ch;

    cout << "Enter a character: ";
    cin >> ch;
    while(ch!='q')
    {
        cout << "Enter a integer: ";
        cin >> times;
        n_chars(ch,times);
        cout << "\nEnter another character or press the"
                "q-key to quit: ";
        cin>> ch;
    }
    cout << "The value of times is " << times << ".\n";
    cout << "Bye\n";
    return 0;
}
//显示c n次.
void n_chars(char c,int n)
{
    while (n-- >0)
        cout <<c;
}
